<template>
  <div>
    <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>商品分类</el-breadcrumb-item>
    </el-breadcrumb>

    <el-card>
      <el-row>
        <el-col>
          <el-button type="primary" @click="showAddCateDialog">添加分类</el-button>
        </el-col>
      </el-row>

      <!-- 表格 -->
      <tree-table
        class="treetable"
        :data="catelist"
        :columns="columns"
        :selection-type="false"
        :expand-type="false"
        show-index
        index-text="#"
        border
      >
        <!-- 是否有效 -->
        <template slot="isok" slot-scope="scope">
          <i
            class="el-icon-success"
            style="color: lightgreen"
            v-if="scope.row.cat_deleted === false"
          ></i>
          <i class="el-icon-error" style="color: red" v-else></i>
        </template>
        <!-- 排序 -->
        <template slot="order" slot-scope="scope">
          <el-tag size="mini" v-if="scope.row.cat_level === 0">一级</el-tag>
          <el-tag
            size="mini"
            type="success"
            v-else-if="scope.row.cat_level === 1"
            >二级</el-tag
          >
          <el-tag size="mini" type="warning" v-else>三级</el-tag>
        </template>

        <template slot="opt">
          <el-button size="mino" type="primary" icon="el-icon-edit"
            >编辑</el-button
          >
          <el-button size="mino" type="danger" icon="el-icon-delete"
            >删除</el-button
          >
        </template>
      </tree-table>

      <el-pagination
        @size-change="handleSizeChange"
        @current-change="handleCurrentChange"
        :current-page="querInfo.pagenum"
        :page-sizes="[3, 5, 10, 15]"
        :page-size="querInfo.pagesize"
        layout="total, sizes, prev, pager, next, jumper"
        :total="total"
      >
      </el-pagination>
    </el-card>

    <el-dialog
      title="添加分类"
      :visible.sync="addCatedialogVisible"
      width="50%"
      @close="addCatedialogClose"
    >
      <el-form :model="addCateForm" :rules="addCateFormRules" ref="addCateFormRef"
       label-width="100px" >
  <el-form-item label="分类名称" prop="cat_name">
    <el-input v-model="addCateForm.cat_name"></el-input>
  </el-form-item>

  <el-form-item label="父级分类" >
   <el-cascader
    v-model="selectedKeys"
    :options="parentCateList"
    :props="{ expandTrigger: 'hover',value:'cat_id',label:'cat_name',children:'children'}"
    @change="parentCateChanged" clearable change-on-select
    ></el-cascader>
  </el-form-item>

      </el-form>
      <span slot="footer" class="dialog-footer">
        <el-button @click="addCatedialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addCate"
          >确 定</el-button
        >
      </span>
    </el-dialog>
  </div>
</template>
<script>
export default {
  data() {
    return {
      // 查询条件
      querInfo: {
        type: 3,
        pagenum: 1,
        pagesize: 5,
      },
      // 商品分类的数据列表
      catelist: [],
      total: 0,

      columns: [
        {
          label: '分类名称',
          prop: 'cat_name',
        },
        {
          label: '是否有效',
          type: 'template',
          template: 'isok',
        },
        {
          label: '排序',
          type: 'template',
          template: 'order',
        },
        {
          label: '操作',
          type: 'template',
          template: 'opt',
        },
      ],
      addCatedialogVisible:false,
      addCateForm:{
          cat_name:'',
          cat_pid:0,
          cat_level:0
      },
      addCateFormRules:{
          cat_name:[
              {required:true,message:"请输入分类名称",trigger:'blur'}
          ]
      },
      // 父级分类列表
      parentCateList:[],
     
      selectedKeys:[]
    }
  },
  created() {
    this.getCateList()
  },
  methods: {
    async getCateList() {
      const { data: res } = await this.$http.get('categories', {
        params: this.querInfo,
      })
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取商品分类失败')
      }
      this.catelist = res.data.result
      // console.log(this.catelist)
      this.total = res.data.total
    },

    handleSizeChange(newSize) {
      this.querInfo.pagesize = newSize
      this.getCateList()
    },

    handleCurrentChange(newPage) {
      this.querInfo.pagenum = newPage
      this.getCateList()
    },
    showAddCateDialog(){
        this.getParentCateList()
        this.addCatedialogVisible=true
    },

    // 获取父级分类的数据列表
    async getParentCateList(){
      const {data:res} = await this.$http.get('categories',{params:{type:2}})
      if(res.meta.status !==200){
        return this.$message.error('获取失败')
      }
      // console.log(res)
      this.parentCateList = res.data
      
    },
    // 选择项发生变换
    parentCateChanged(){
      // console.log(this.selectedKeys)
      if(this.selectedKeys.length > 0){
        this.addCateForm.cat_pid = this.selectedKeys[this.selectedKeys.length-1]
        this.addCateForm.cat_level = this.selectedKeys.length
        return
      }else{
        this.addCateForm.cat_pid = 0
        this.addCateForm.cat_level = 0
      }
    },

    addCate(){
      // console.log(this.addCateForm)
      this.$refs.addCateFormRef.validate(async valid=>{
        if(!valid) return
        const {data:res} = await this.$http.post('categories',this.addCateForm)
        if(res.meta.status !==201){
          return this.$message.error('添加分类失败')
        }
        this.$message.success('添加分类成功')
        this.getCateList()
        this.addCatedialogVisible = false
      })
    
    },
    addCatedialogClose(){
      this.$refs.addCateFormRef.validate(valid=>{
        if(!valid) return

      })
      this.$refs.addCateFormRef.resetFields()
      this.selectedKeys=[]
    }
  },
}
</script>

<style lang="less" scoped>
.el-breadcrumb-item {
  font-size: 15px;
}
.treetable {
  margin-top: 15px;
}
</style>